How are the terms society, megaliths, and neolithic era related

A megalith is a large prehistoric stone that has been used to construct a structure or monument, either alone or together with other stones. Most extant megaliths were erected between the Neolithic period (although earlier Mesolithic examples are known) through the Chalcolithic period and into the Bronze Age.

Explanation:

c-flooding of the area and the development of wetlands.

tell me if im wrong.